package flex.cc.store.util;
 
import java.awt.BasicStroke;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Shape;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.OutputStream;
import java.util.Date;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Map;

import javax.imageio.ImageIO;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.Result;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

/**
 * 
 * @author WANGCONG
 * 2021年12月16日上午9:36:18
 * @desc 二维码生成工具类
 */
public class QRCodeUtil {
    private static final String CHARSET = "utf-8";
    private static final String FORMAT_NAME = "JPG";
    // 二维码尺寸
    private static final int QRCODE_SIZE = 300;
    // LOGO宽度
    private static final int WIDTH = 90;
    // LOGO高度
    private static final int HEIGHT = 90;
    //logo图像
    private static String logoPath = "http://82.157.24.156:9002/file/qr/qr_logo.png";
    
//  private static String TEMP_DIR = "http://82.157.24.156:9002/file/pictures/qr"; //存放二维码的临时路径
 
    public static void main(String[] args) throws Exception{
    	// 存放在二维码中的内容
        String text = "abcdefg"; //存放卡券的加密串
        // 嵌入二维码的图片路径
        String imgPath = "D:/qrCode/logo3.png";
        // 生成的二维码的路径及名称
        String destPath = "D:/qrCode/test.jpg";
        encode(text, imgPath, destPath, true);
        // 解析二维码
        String str = decode(destPath);
        // 打印出解析出的内容
        System.out.println(str);
        //用完之后删除
//        File filePath = new File(destPath);
//        if(filePath.exists()){
//        	filePath.delete();
//        }
	}
    
    /**
     * 
     * @author WANGCONG
     * 2021年12月20日上午10:23:26
     * @desc 二维码生成入口
     */
    public static Map<String,Object> createQR(String couponNum){
    	Map<String,Object> resultMap = new HashMap<String,Object>();
    	String imgStr = "";
    	String destPath = System.getProperty("user.dir") + File.separator + "qr" + File.separator + System.currentTimeMillis()+".jpg";
    	Date createDate = new Date();
//    	String createTime = DateUtil.DateToString(createDate,"yyyy-MM-dd HH:mm:ss");
//    	String content = "{\"couponNum\":"+couponNum+",\"createTime\":"+createTime+"}";
    	String content = couponNum;
    	try {
    		//第二个参数为要嵌套的图片
    		String logoPath = QRCodeUtil.logoPath;
			imgStr = encode(content, logoPath, destPath, true);
			//用完之后删除
	        File filePath = new File(destPath);
	        if(filePath.exists()){
	        	filePath.delete();
	        }
	        resultMap.put("code", "0");
	        resultMap.put("imgStr", imgStr);
	        resultMap.put("couponNum", couponNum);
	        resultMap.put("createDate", createDate);
	        resultMap.put("msg", "成功");
		} catch (Exception e) {
			resultMap.put("code", "1");
			resultMap.put("msg", "二维码生成失败");
			imgStr = "二维码生成失败";
		}
    	return resultMap;
    }
    
    /**
     * 
     * @author WANGCONG
     * 2021年12月16日上午9:36:18
     * @param content：存放在二维码中的内容（包含卡券编码，生效时间信息，供商家扫描）
     * @param imgPath：嵌入二维码的图片路径（此字段赋值为空）
     * @param destPath：生成的二维码的存放路径
     * @param needCompress：true表示将嵌入二维码的图片进行压缩
     */
    public static String encode(String content, String imgPath, String destPath, boolean needCompress) throws Exception {
        BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
        mkdirs(destPath);
        ImageIO.write(image, FORMAT_NAME, new File(destPath));
        String img_str = Base64Img.GetImageStr(new File(destPath));
//      System.out.println("图片转化成字符串="+img_str);
        return img_str;
    }
    
    @SuppressWarnings({ "rawtypes", "unchecked" })
	private static BufferedImage createImage(String content, String imgPath, boolean needCompress) throws Exception {
        Hashtable hints = new Hashtable();
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
        hints.put(EncodeHintType.MARGIN, 1);
        BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
        int width = bitMatrix.getWidth();
        int height = bitMatrix.getHeight();
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
            }
        }
        if (imgPath == null || "".equals(imgPath)) {
            return image;
        }
        // 插入图片
        QRCodeUtil.insertImage(image, imgPath, needCompress);
        return image;
    }
 
    private static void insertImage(BufferedImage source, String imgPath, boolean needCompress) throws Exception {
    	String temp_imgPath = "/apps/appwork/view_app/file/qr/qr_logo.png";
//    	String temp_imgPath = "/file/qr/qr_logo.png";
        File file = new File(temp_imgPath);
        if (!file.exists()) {
            System.err.println("" + temp_imgPath + "   该文件不存在！");
            return;
        }
        Image src = ImageIO.read(new File(temp_imgPath));
        int width = src.getWidth(null);
        int height = src.getHeight(null);
        if (needCompress) { // 压缩LOGO
            if (width > WIDTH) {
                width = WIDTH;
            }
            if (height > HEIGHT) {
                height = HEIGHT;
            }
            Image image = src.getScaledInstance(width, height, Image.SCALE_SMOOTH);
            BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
            Graphics g = tag.getGraphics();
            g.drawImage(image, 0, 0, null); // 绘制缩小后的图
            g.dispose();
            src = image;
        }
        // 插入LOGO
        Graphics2D graph = source.createGraphics();
        int x = (QRCODE_SIZE - width) / 2;
        int y = (QRCODE_SIZE - height) / 2;
        graph.drawImage(src, x, y, width, height, null);
        Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
        graph.setStroke(new BasicStroke(3f));
        graph.draw(shape);
        graph.dispose();
    }
 
    public static BufferedImage encode(String content, String imgPath, boolean needCompress) throws Exception {
        BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
        return image;
    }
 
    public static void mkdirs(String destPath) {
        File file = new File(destPath);
        // 当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)
        if (!file.exists() && !file.isDirectory()) {
            file.mkdirs();
        }
    }
 
    public static void encode(String content, String imgPath, String destPath) throws Exception {
        QRCodeUtil.encode(content, imgPath, destPath, false);
    }
    public static void encode(String content, String destPath) throws Exception {
        QRCodeUtil.encode(content, null, destPath, false);
    }
 
    public static void encode(String content, String imgPath, OutputStream output, boolean needCompress)
            throws Exception {
        BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
        ImageIO.write(image, FORMAT_NAME, output);
    }
 
    public static void encode(String content, OutputStream output) throws Exception {
        QRCodeUtil.encode(content, null, output, false);
    }
 
    @SuppressWarnings({ "rawtypes", "unchecked" })
    public static String decode(File file) throws Exception {
        BufferedImage image;
        image = ImageIO.read(file);
        if (image == null) {
            return null;
        }
        BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);
        BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
        Result result;
        Hashtable hints = new Hashtable();
        hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
        result = new MultiFormatReader().decode(bitmap, hints);
        String resultStr = result.getText();
        return resultStr;
    }
 
    public static String decode(String path) throws Exception {
        return QRCodeUtil.decode(new File(path));
    }
 
}
